linux-kernel - Re: [PATCH 0/6] usb: gadget: add mechanism to asynchronously validate data stage of ctrl out request

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Date:   Thu, 11 Oct 2018 14:31:42 -0500
From:   Bin Liu <b-liu@...com>
To:     Paul Elder <paul.elder@...asonboard.com>
CC:     <laurent.pinchart@...asonboard.com>,
        <kieran.bingham@...asonboard.com>, <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <balbi@...nel.org>, <stern@...land.harvard.edu>, <rogerq@...com>
Subject: Re: [PATCH 0/6] usb: gadget: add mechanism to asynchronously
 validate data stage of ctrl out request

Hi,

On Tue, Oct 09, 2018 at 10:48:57PM -0400, Paul Elder wrote:
> This patch series adds a mechanism to allow asynchronously validating
> the data stage of a control out request, and for stalling or suceeding
> the request accordingly. This mechanism is implemented for MUSB, and is
> used by UVC. At the same time, UVC packages the setup stage and data

Why is this for MUSB only? Other UDC such as DWC3 doesn't need this?

Regards,
-Bin.